Reference : Thermo-optical properties of colloidal solutions of CdTe nanoparticles
Scientific journals : Article
Engineering, computing & technology : Electrical & electronics engineering
Engineering, computing & technology : Materials science & engineering
Thermo-optical properties of colloidal solutions of CdTe nanoparticles
Rosso, Vanessa mailto [Université de Liège - ULg > Département de physique > Département de physique >]
Loicq, Jerôme mailto [Université de Liège - ULg > > CSL (Centre Spatial de Liège) >]
Galstian, T. [> > > >]
Renotte, Yvon mailto [Université de Liège - ULg > Département de physique > Département de physique >]
Lion, Yves [Université de Liège - ULg > > Physique générale (caract. opt. et magnétique des matériaux) >]
Optical Materials
Elsevier Science Bv
Yes (verified by ORBi)
[en] thermal lens ; Z-scan ; semiconductor nanocrystals
[en] Colloidal solutions of CdTe nanoparticles have been prepared by the "electropulse" technique. The diameters of the CdTe nanoparticles range from 5 to 30 nm. The goal of this work is to study the formation and evolution of the induced thermo-refractive index with a long-term goal of forming a thermal lens. An induced thermo-refractive index occurs when the CdTe solutions are irradiated with a strong laser beam. The experimental approach is derived from the Z-scan technique, a technique which is very sensitive to refractive index modulation in a sample. Thermo-optical coefficients, such as the thermal diffusivity, D, the characteristic build-up time of the thermal lens, t(c), and the induced thermo-refractive index can be determined from dynamic Z-scan curves. The thermo-optical coefficients have been determined at different wavelengths, beam powers, and for different nanoparticles sizes. (C) 2005 Elsevier B.V. All rights reserved.

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